/Engine/Source/Developer/TextureCompressor/Public/TextureCompressorModule.h
Generate a full mip chain. The input mip chain must have one or more mips.
static void GenerateMipChain ( const [FTextureBuildSettings](API\Developer\TextureCompressor\FTextureBuildSettings) & Settings, const [FImage](API\Runtime\ImageCore\FImage) & BaseImage, [TArray](API\Runtime\Core\Containers\TArray)< [FImage](API\Runtime\ImageCore\FImage) > & OutMipChain, uint32 MipChainDepth )